A kind of ultra-high conductivity aluminum-clad steel strand and its production process
A technology of aluminum-clad steel and electrical conductivity, which is applied in the direction of conductive materials, conductive materials, and used to reduce the size of conductors/cables, etc., which can solve the problem of limited conductivity, unbalanced performance, and difficult control of bimetal synchronous stretching, etc. problem, to achieve the effect of increasing elastic modulus, reducing sag, and reducing tower base investment
Active Publication Date: 2022-02-25
HENAN TONG CABLE
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Problems solved by technology
However, the highest conductivity of the existing aluminum-clad steel strand product series is only 40% IACS, and the conductivity is limited. It is mainly known for its breaking force, and its performance is not balanced enough.
The invention patent with application publication number CN 102592714A discloses an aluminum-clad steel strand and its production method. It adopts a bimetallic synchronous stretching process, that is, the aluminum wire is continuously coated on the outside of the steel core, then the wire is drawn, and finally twisted. , but the control of bimetal synchronous stretching in the stretching process is a difficult point
Method used
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Experimental program
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Embodiment 1
[0018] An aluminum-clad steel stranded wire with ultra-high conductivity, in which the steel wire cross-section accounts for 15.17%, and the draw-to-weight ratio is 11.1.
[0019] The ultra-high electrical conductivity aluminum-clad steel strand of the invention has an electrical conductivity of 53.96%IACS, a tensile strength of 385.5MPa, and a specific gravity of 3.473.
[0020] The production method of the above-mentioned ultra-high conductivity aluminum-clad steel strand comprises the following steps:
[0021] A: Select 82A steel wire as the steel wire blank, carry out wire laying, steel wire straightening, steel wire cleaning, steel wire heating, and the end is thinned by a pointing machine, and the steel wire enters the mold and is drawn under the action of the wire drawing machine and the mold wall; The strength of the steel wire after drawing is not less than 2150MPa, and the elongation is not less than 3%.
[0022] B: cladding, the aluminum rod is clad on the drawn st...
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Abstract
The invention belongs to the technical field of overhead transmission wires in the electric power industry, and discloses an aluminum-clad steel strand with ultra-high conductivity. In the aluminum-clad steel strand, the steel wire cross-section accounts for 15.17% and the draw-to-weight ratio is 11.1. Also disclosed is the production method of the above-mentioned ultra-high conductivity aluminum-clad steel strand, which includes the following steps: selecting 82A steel wire as the steel wire blank, performing steel wire unwinding, steel wire straightening, steel wire cleaning, and steel wire heating; Thin rolling, the steel wire enters the mold and is drawn under the action of the wire drawing machine and the mold wall; cladding, using a cladding machine to coat the aluminum rod on the drawn steel wire to obtain an aluminum-clad steel single-wire billet; for aluminum-clad steel single-wire The blank is subjected to 1-mode micro-deformation drawing to improve the surface finish; the aluminum-clad steel single wire is stranded in a cage stranding machine to obtain an aluminum-clad steel strand. In the present invention, by limiting the steel wire material, arrangement method and changing the processing method, the aluminum-clad steel strand with ultra-high conductivity produced can replace the high-strength aluminum alloy strand.
Description
technical field [0001] The invention belongs to the technical field of overhead transmission wires in the electric power industry, and relates to an aluminum-clad steel strand with ultrahigh conductivity and a production method thereof. Background technique [0002] Power distribution and transmission is an essential link in the power system. At present, power distribution and transmission in the power system mainly rely on overhead transmission wires as the main carrier of power transmission. There are many varieties of overhead transmission wires, such as aluminum stranded wire, aluminum alloy stranded wire, steel cored aluminum stranded wire, aluminum clad steel stranded wire, etc. These wires must meet the two most basic functional requirements of carrying current and carrying tension. Conductors can meet different requirements of breaking force and ampacity. These two basic performance indicators basically show a nonlinear inverse relationship, that is, high strength an...
Claims
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IPC IPC(8): H01B5/10H01B1/02H01B13/00H01B13/02
CPCH01B5/10H01B1/02H01B1/023H01B13/0006H01B13/02
Inventor 王军棋马红菊张治中赵大贝王博柳明明谢育龙
Owner HENAN TONG CABLE